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storage capacity allocation strategy for distribution network with distributed photovoltaic generators

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Journal of Modern Power Systems and Clean Energy 2018年第6期6卷 1234-1243页

作者： Bin LI Xingchen LI Xiaoqing BAI Zhineng LI Guangxi Key Laboratory of Power System Optimization and Energy Technology Guangxi University

Distributed photovoltaic generators(DPGs) have been integrated into the medium/low voltage distribution network widely. Due to the randomness and fluctuation of DPG, however, the distribution and direction of power flow changed frequently some days. Therefore, more attention is needed to ensure the safe operation of the distribution network. The installation of energy storage systems(ESSs) can help the network withstand thefluctuations caused by DPG. Based on the discrete Fourier transform method, this paper presents an ESS capacity allocation strategy for the medium/low voltage distribution network with DPG. The reliability scenario models are created via Latin hypercube sampling with Cholesky decomposition and scenario reduction. Numerical results show that the proposed strategy can reduce the power flow fluctuation with less ESS capacity, and increase the penetration capacity of DPG in the distribution network while maintaining the quality of the power supply.

关键词： Discrete Fourier transform Distributed photovoltaic Energy storage system Medium/low voltage distribution network

storage of Entangled States with Multiple Trapped Ions in Thermal Motion

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Communications in Theoretical Physics 2006年第4期45卷 605-608页

作者： GONG Xiao-Long YANG Wen-Xing Department of Physics Yangtze University Jingzhou 434100 China Department of Physics Huazhong University of Science and Technology Wuhan 430074 China Wuhan Institute of Physics and Mathematics the Chinese Academy of Sciences Wuhan 430071 China

This paper presents an alternative scheme to realize the storage of entangled states for multiple trapped ions including W state, Bell states, and GHZ states even with ions which exchange vibrational energy with a heating surrounding, Our scheme requires that the ions be simultaneously excited by two laser beams with different frequencies. In this scheme the vibrational degrees of freedom are only regarded as intermediate states and the ions exchange energy via the mediation of the vibration of the vibrational mode in coupling processes. The scheme is insensitive to both the initial vibrational state and heating if the system remains in the Lamb Dicke regime. Since the effective Rabi frequency has a small dependence on the vibrational quantum number the heating will have no direct, effect on the internal state evolution.

关键词： entangled state storage trapped ions

An overview of progress in Mg-based hydrogen storage films

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Chinese Physics B 2019年第9期28卷 68-77页

作者： Lyu Jinzhe Andrey M Lider Viktor N Kudiiarov Division for Experimental Physics School of Nuclear Science & Engineering National Research Tomsk Polytechnic University

Mg-based hydrogen storage materials are considered to be one of the most promising solid-state hydrogen storage materials due to their large hydrogen storage capacity and low cost. However, slow hydrogen absorption/desorption rate and excessive hydrogen absorption/desorption temperature limit the application of Mg-based hydrogen storage *** present paper reviews the advances in the research of Mg-based hydrogen storage film in recent years, including the advantage of the film, the function theory of fabricating method and its functional theory, and the influencing factors in the technological process. The research status worldwide is introduced in detail. By comparing pure Mg, Pd-caped Mg, nonpalladium capped Mg, and Mg alloy hydrogen storage films, an ideal tendency for producing Mg-based film is pointed out,for example, looking for a cheap metal element to replace the high-priced Pd, compositing Mg film with other hydrogen storage alloy of catalytic elements, and so on.

关键词： Mg-based hydrogen storage film Pd-caped Mg film Mg alloy film interlayer intermetallic cooperative effect

Even FIB Decomposition Model Based on storage and Traffic Balancing

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Chinese Journal of Electronics 2017年第4期26卷 681-687页

作者： CHEN Wenlong WANG Shuxian TANG Xiaolan LAN Lijing College of Information Engineering Capital Normal University

The sharp expansion of the FIB table rapidly aggravates the hardware cost of Line cards(LCs) in the high-performance distributed routers. The storage optimization of FIB becomes a research hotspot. The traffic load of each LC is still very different in the current nonfull backup storage, which has a deep impact on the overall forwarding performance of the routers. An even FIB decomposition model was proposed, namely FEST, aiming for a two-dimension balance in both storage and traffic. Based on the splitting and distribution filters, FEST starts with splitting the root prefixes and utilizes the optimal adaptation algorithm to evenly distribute the routing entries and the traffic to LCs without the modification of the hardware designs of the current LCs. Eventually FEST uses the location routing to determine the location and the forwarding of every packet. The experiment results show that different LCs get very even numbers of routing entries and relatively even traffic in FEST.

关键词： FIB Decomposition storage Traffic

Synthesis of a ternary amide LixKy（NH2）x+y and a novel Li3K（NH2）4–xMgH2 combination system for hydrogen storage

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Journal of Energy Chemistry 2019年第8期28卷 37-43,I0002页

作者： Chao Li Changlong Li Meiqiang Fan Haichao Chen Kangying Shu Yu Zhang Mingxia Gao Yongfeng Liu Hongge Pan College of Materials Science and Engineering China Jiliang UniversityHangzhou 310018 Zhejiang China State Key Laboratory of Silicon Materials and School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027 Zhejiang China School of Materials Science and Engineering Hubei University of Automotive TechnologyShiyan 442002 Hubei China

The ternary amides LiK2(NH2)3, LiK(NH2)2, and Li3 K(NH2)4 are successfully synthesized by ball milling mixtures of LiNH2 and KNH2, and the hydrogen storage properties of Li3K(NH2)4–xMgH2(x = 1, 2, 3,4) are systematically investigated. The Li3K(NH2)4–2 Mg H2 sample displays optimized hydrogen storage properties, releasing 6.37 wt% of hydrogen in a two-stage reaction with an onset temperature of 60 °*** first dehydrogenation stage exhibits good reaction kinetics and thermodynamic properties because of a lower activation energy and appropriate enthalpy change. After full dehydrogenation at 130 °C, the Li3K(NH2)4–2 MgH2 sample absorbs 3.80 wt% of H2 below 160 °C in a variable temperature hydrogenation mode. Mechanistic investigations indicate that Li3 K(NH2)4 reacts with Mg H2 to produce Mg(NH2)2, LiH,and KH during ball milling. In the heating process, Mg(NH2)2 first reacts with Li H to form Li2 Mg2 N3 H3 and Li NH2, while KH works as a catalyst, and then, KH reacts with Li2Mg2N3H3 and Li NH2 to generate a new K-containing compound.

关键词： Hydrogen storage Complex hydrides Amides Reversibility Reaction mechanisms

Selecting and optimal sizing of hybridized energy storage systems for tidal energy integration into power grid

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Journal of Modern Power Systems and Clean Energy 2019年第1期7卷 113-122页

作者： Seifeddine BEN ELGHALI Rachid OUTBIB Mohamed BENBOUZID LIS-UMR CNRS 7020 University of Aix-Marseille UMR CNRS 6027 IRDL University of Brest Shanghai Maritime University

The high penetration of renewable energy systems with fluctuating power generation into the electric grids affects considerably the electric power quality and supply ***, energy storage resources are used to deal with the challenges imposed by power variability and demand-supply *** main focus of this paper is to investigate the appropriate storage technologies and the capacity needed for a successful tidal power ***, a simplified sizing method, integrating an energy management strategy, is *** method allows the selection of the adequate storage technologies and determines the required least-cost storage capacity by considering their technological limits associated with different power *** optimal solutions given by the multi-objective evolutionary algorithm are presented and analyzed.

关键词： Tidal energy Energy storage system Optimal sizing Selection

Low-Co rare-earth-based hydrogen storage alloy

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中国有色金属学会会刊：英文版 2000年第5期10卷 660-665页

作者：李全安桑革李建文陈云贵涂铭旌李宁四川大学四川成都

On the basis of typical high Co MI(Lanthanum rich mischmetal) based hydrogen storage alloy, a series oflow Co or Co free alloys have been prepared by means of partial or full replacement of Co by a combination of other elements. The microstructures, p c T (pressure concentration temperature) characteristics and electrochemical propertiesunder different charge discharge conditions of the alloys have been investigated. Compared with the high Co alloy, thelow Co or Co free alloys have the lower hydrogen equilibrium pressure and discharge capacity, but have the nearly samehigh rate and high temperature discharge capability, and better charge discharge cycling stability. The reason is revealedby SEM, XPS and XRD results. \[

关键词： low Co hydrogen storage alloy metal hydride electrode rare earth alloy electrochemical property Ni MH battery

Estimating the Economics of Electrical Energy storage Based on Different Policies in China

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Journal of Thermal Science 2020年第2期29卷 352-364页

作者： DING Jie XU Yujie WANG Ziyi HU Shan CHEN Haisheng Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Dalian National Laboratory for Clean Energy Chinese Academy of SciencesDalian 116023China

This paper assesses the value of bulk grid-scale energy storage(GES) technologies in six electric power districts of China. The economic feasibility of GES under three different types of compensation mechanisms was analyzed. Based on a careful investigation of China’s existing power system, a unit commitment model that comprehensively reflects the production costs(including reduction of fuel consumption, grid loss, ancillary services and so on) of the entire power grid has been proposed. The benefits of GES can be obtained by comparing the production costs of two different scenarios: with and without GES. Results show that under the current scheduling methods and compensation mechanisms, in most provinces in China, the energy storage’s revenue is lower than the value that it brings.

关键词： energy storage Chinese power market economic assessment benefit estimation policy comparison

The impact of connate water saturation and salinity on oil recovery and CO2 storage capacity during carbonated water injection in carbonate rock

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Chinese Journal of Chemical Engineering 2019年第7期27卷 1699-1707页

作者： Mahmood Shakiba Masoud Riazi Shahab Ayatollahi Mostafa Takband Department of Petroleum Engineering Amirkabir University of TechnologyTehranIran Enhanced Oil Recovery (EOR) Research Centre IOR/EOR Research InstituteShiraz UniversityShirazIran Petroleum Engineering Department School of Chemical and Petroleum Eng.Shiraz UniversityShirazIran School of Chemical and Petroleum Engineering Sharif University of TechnologyTehranIran

Carbonated water injection(CWI)is known as an efficient technique for both CO2 storage and enhanced oil recovery(EOR).During CWI process,CO2 moves from the water phase into the oil phase and results in oil *** mechanism is considered as a reason for *** fingering leading to early breakthrough and leaving a large proportion of reservoir un-swept is known as an unfavorable phenomenon during flooding ***,instability at the interface due to disturbances in porous medium promotes viscous fingering *** water makes viscous fingers longer and more irregular consisting of large number of tributaries leading to the ultimate oil recovery ***,higher in-situ water content can worsen this ***,this water can play as a barrier between oil and gas phases and adversely affect the gas diffusion,which results in EOR *** the other hand,from gas storage point of view,it should be noted that CO2 solubility is not the same in the water and oil *** this study for a specified water salinity,the effects of different connate water saturations(Swc)on the ultimate oil recovery and CO2 storage capacity during secondary CWI are being presented using carbonate rock samples from one of Iranian carbonate oil *** results showed higher oil recovery and CO2 storage in the case of lower connate water saturation,as 14%reduction of Swc resulted in 20%and 16%higher oil recovery and CO2 storage capacity,respectively.

关键词： Carbonated water Connate water Carbonate reservoir Enhanced oil recovery Secondary recovery CO2 storage